Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/75-15 | 30/9.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.88 (733.5) | 29.99 (761.78) | 1.11 (28.28) 3.9% |
| Width inches (mm) | 9.25 (235) | 9.49 (241) | 0.24 (6) 2.6% |
| Circum. inches (mm) | 90.72 (2304.36) | 94.22 (2393.2) | 3.5 (88.84) 3.9% |
| Sidewall Height inches (mm) | 6.94 (176.25) | 7.5 (190.39) | 0.56 (14.14) 8% |
| Revolutions per mile (km) | 698.39 (433.96) | 672.46 (417.85) | -25.93 (-16.11) -3.7% |
30/9.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.77 mph (33.43 km/h) |
| 25 mph (40.23 km/h) | 25.96 mph (41.78 km/h) |
| 30 mph (48.28 km/h) | 31.16 mph (50.14 km/h) |
| 35 mph (56.33 km/h) | 36.35 mph (58.5 km/h) |
| 40 mph (64.37 km/h) | 41.54 mph (66.86 km/h) |
| 45 mph (72.42 km/h) | 46.73 mph (75.21 km/h) |
| 50 mph (80.47 km/h) | 51.93 mph (83.57 km/h) |
| 55 mph (88.51 km/h) | 57.12 mph (91.93 km/h) |
| 60 mph (96.56 km/h) | 62.31 mph (100.28 km/h) |
| 65 mph (104.61 km/h) | 67.51 mph (108.64 km/h) |
| 70 mph (112.65 km/h) | 72.7 mph (117 km/h) |
| 75 mph (120.7 km/h) | 77.89 mph (125.35 km/h) |
| 80 mph (128.75 km/h) | 83.08 mph (133.71 km/h) |
| 85 mph (136.79 km/h) | 88.28 mph (142.07 km/h) |
| 90 mph (144.84 km/h) | 93.47 mph (150.43 km/h) |
| 95 mph (152.89 km/h) | 98.66 mph (158.78 km/h) |
| 100 mph (160.93 km/h) | 103.86 mph (167.14 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1711 | 1988 | 2141 | 2236 | 2338 | 2410 | 2490 | 2585 | 2716 | 2847 | 2993 | 3109 | 3321 | 3554 | 3736 | 3852 | 3918 | 4158 | 4493 | 5221 |
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